Initialize and Finalize

The following functions and classes manage the Kokkos execution environment environment and resource cleanup:

initialize	Initializes Kokkos internal objects and all enabled Kokkos backends.
finalize	Shutdown Kokkos execution environment and release internally managed resources.
InitializationSettings	A class representing control knobs of the runtime behavior (such as thread counts or device ID).
ScopeGuard	RAII-based approach to ensure initialization and finalization are handled correctly.
push_finalize_hook	Register a function to be called on finalize() invocation.
is_initialized and is_finalized	Query initialization status of Kokkos